Trick 1: (Updated on 2 September 2012):
Hi Friends, her is latest another working proxy for Airtel, This trick is based on tadkalive proxy which was working in past and now working once again, try and enjoy airtel free gprs proxy trick September 2012.
Create new settings or change settings as mentioned below:-

Note:
to avoid sim blocking:
Please, don’t download more than 50MB continuously, otherwise you may be blocked by airtel to use free airtel gprs tricks. So we recommend, pause around 45 MB, disconnect and reconnect and then resume download.

Trick 3:

Trick to avoid sim blocking and surfing unlimitedly in mobile with UC and Opera:

Hello my freebies friends, here I am giving a working trick for airtel free gprs with front query trick. This trick is working in some state only where any of the free homepage were working. This trick is working in southern state like Kerala, Karnataka, Kashmir and some state like Bihar, Jharkhand etc. You need to modify proxy settings to enjoy Airtel Free GPRS Front Query Trick September 2012. Follow my procedure and enjoy free front query 3G net getting trick in airtel. This trick is confirmed working as on 9 10 11 12 13 14 15 16 17 18 19 20th September 2012